| 摘要 |
PROBLEM TO BE SOLVED: To provide a regeneration structure of tank, which allows an existing tank with one air-tight layer to be regenerated at low cost into a tank with high-safety two air-tight layers, having, furthermore, a structure that enables early discovery of leakage of a flammable liquid stored in the tank. SOLUTION: A deterioration-preventive treatment of steel is provided on the inner wall surface of the existing underground steel tank A, thus providing a deterioration-preventive treatment layer 7, while a plurality of curved surface bodies 9 with a given thickness are provided in linkage across the whole of the inner circumferential surface of the deterioration-preventive treatment layer 7, and in between these whole of the curved surface bodies 9 in linkage, water-passage layers 8 are provided in succession that are capable of passing water or air, with an air-tight layer 14 being formed across the whole of the inner circumferential surface of the water-passage layers 8, by sticking regeneration material thereto. COPYRIGHT: (C)2005,JPO&NCIPI
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